Add support for torch to stablehlo and tosa in shark_importer (#1360)

shark/shark_importer.py

@@ -81,7 +81,7 @@ class SharkImporter:
 
     # NOTE: The default function for torch is "forward" and tf-lite is "main".
 
-    def _torch_mlir(self, is_dynamic, tracing_required):
+    def _torch_mlir(self, is_dynamic, tracing_required, mlir_type):
         from shark.torch_mlir_utils import get_torch_mlir_module
 
         return get_torch_mlir_module(
@@ -90,6 +90,7 @@ class SharkImporter:
             is_dynamic,
             tracing_required,
             self.return_str,
+            mlir_type,
         )
 
     def _tf_mlir(self, func_name, save_dir="."):
@@ -120,6 +121,7 @@ class SharkImporter:
         tracing_required=False,
         func_name="forward",
         save_dir="./shark_tmp/",
+        mlir_type="linalg",
     ):
         if self.frontend in ["torch", "pytorch"]:
             if self.inputs == None:
@@ -127,7 +129,10 @@ class SharkImporter:
                     "Please pass in the inputs, the inputs are required to determine the shape of the mlir_module"
                 )
                 sys.exit(1)
-            return self._torch_mlir(is_dynamic, tracing_required), func_name
+            return (
+                self._torch_mlir(is_dynamic, tracing_required, mlir_type),
+                func_name,
+            )
         if self.frontend in ["tf", "tensorflow"]:
             return self._tf_mlir(func_name, save_dir), func_name
         if self.frontend in ["tflite", "tf-lite"]:

shark/torch_mlir_utils.py

@@ -19,6 +19,12 @@ import tempfile
 from shark.parser import shark_args
 import io
 
+mlir_type_mapping_dict = {
+    "linalg": torch_mlir.OutputType.LINALG_ON_TENSORS,
+    "mhlo": torch_mlir.OutputType.STABLEHLO,
+    "tosa": torch_mlir.OutputType.TOSA,
+}
+
 
 def get_module_name_for_asm_dump(module):
     """Gets a name suitable for an assembly dump.
@@ -57,6 +63,7 @@ def get_torch_mlir_module(
     dynamic: bool,
     jit_trace: bool,
     return_str: bool = False,
+    mlir_type: str = "linalg",
 ):
     """Get the MLIR's linalg-on-tensors module from the torchscipt module."""
     ignore_traced_shapes = False
@@ -70,10 +77,11 @@ def get_torch_mlir_module(
     mlir_module = torch_mlir.compile(
         module,
         input,
-        output_type=torch_mlir.OutputType.LINALG_ON_TENSORS,
+        output_type=mlir_type_mapping_dict[mlir_type],
         use_tracing=jit_trace,
         ignore_traced_shapes=ignore_traced_shapes,
     )
+
     if return_str:
         return mlir_module.operation.get_asm()
     bytecode_stream = io.BytesIO()